Borrowing it
Nothing to install: this file belongs to tacticlaunch/mcp-linear. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/tacticlaunch/mcp-linear/main/.github/skills/add-mcp-tool/SKILL.mdgit clone --depth 1 https://github.com/tacticlaunch/mcp-linearWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/tacticlaunch/mcp-linear/add-mcp-tool)<a href="https://agentmods.dev/skills/tacticlaunch/mcp-linear/add-mcp-tool"><img src="https://agentmods.dev/badge/skills/tacticlaunch/mcp-linear/add-mcp-tool/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/tacticlaunch/mcp-linear/add-mcp-tool"><img src="https://agentmods.dev/badge/skills/tacticlaunch/mcp-linear/add-mcp-tool.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00036 | $0.00303 |
| Opus 5.5 | $0.00014 | $0.00121 |
| Sonnet 5.5 | $0.00007 | $0.00061 |
| Haiku 4.5 | $0.00004 | $0.00030 |
Grade A, and why
add-mcp-tool scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Use this workflow when adding a tool to mcp-linear.
Goal
Implement a Linear capability end-to-end so the MCP surface, runtime behavior, and docs stay aligned.
Workflow
- Inspect the existing domain files under
src/tools/definitions,src/tools/handlers, andsrc/services/linear-service.tsto find the closest pattern. - Check whether the capability already exists in
LinearService. - Inspect
@linear/sdkbefore writing new GraphQL. - Implement or update the service method so it returns normalized plain objects.
- Add or update the tool definition with explicit required fields, enums, nullability, and numeric constraints.
- Add or update the handler so it validates, delegates, and logs failures.
- Add or update the type guard in
src/tools/type-guards.ts. - Register the tool in both index files.
- Update
TOOLS.md. - Add focused tests in
src/__tests__. - Run
npm testandnpm run build.
Project-specific reminders
- Prefer SDK methods first.
- If you use direct GraphQL because the SDK is stale or missing support, document why.
- Keep handlers thin.
- Be exact about nullable update semantics and output schema fidelity.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 32 lines · 36 tokens per session scan A 94e5c7f85e83
add-mcp-tool is a skill published in the GitHub repository tacticlaunch/mcp-linear (148 stars, last pushed 17d ago), licensed MIT. It adds 36 tokens to every session and 303 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
pkf-writing
Author, update, convert, validate, persist, and render PKF (.pkf) content through message-inline, Library Asset, or Memory Page carriers. Use for structured reports, knowledge pages, delivery cards, or any .pkf body. NOT for recall, memory-graph placement, or curation decisions — those belong to the memory skill.
render-3d-product-showcase
Assemble a premium 3D product-showcase ad from a config — four beat clips (an orbiting hero rotation, a macro push-in, a physics reveal, a typographic close) normalized to the chosen backdrop colour, hard-concatenated in order, closed on a deterministic Playwright brand end card, and mixed under one instrumental bed…
render-airdrop-carousel
Assemble a viral iOS "AirDrop" notification-carousel video ad (≈6–8s, 9:16) from a brand line plus 6–16 real product photos — a native AirDrop share-sheet card ("Brand would like to share a · Decline / Accept") springs up and its preview window CYCLES through the products, landing on a range/lineup payoff with an…
email-lifecycle-flow-writer
Step of the email-lifecycle playbook: writes one lifecycle flow as a build sheet for the brand's email tool, every message finished in the brand voice. Run email-lifecycle instead; not for direct use.
work-with-creators-creator-vetting
Vets creators you have already named from their public pages. Covers the median views of their last 12 to 20 posts (sponsored and organic apart), a read of their comments, how often they post, audience fit with how sure it is, about 12 months of brand-safety checks, rival partnerships and rules for regulated…
loop-engineering
Shared loop-engineering reference for COG skills - the agent loop, deterministic verifiers, termination conditions, in-loop context management, and named patterns. Invoke when designing or debugging a skill that iterates (search-verify-retry, scan-until-dry, fetch-retry-gate).